Radiation protection dosimetry最新文献

Recalculation of scatter fractions for homogeneous and heterogeneous geometries using Geant4 Monte Carlo simulations. 使用Geant4蒙特卡罗模拟重新计算均匀和非均匀几何的散射分数。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-13 DOI: 10.1093/rpd/ncaf050

Syed Abdul Haseeb Ahmad, Syed Bilal Ahmad, Zain Ul Abidin, Nosheen Faiz, Iftikhar Ahmad

引用次数: 0

Dose coefficients of ICRP adult reference voxel phantom for internal dosimetry of selected radiopharmaceuticals using Geant4/GATE simulation. 使用Geant4/GATE模拟选定放射性药物内剂量测定的ICRP成人参考体素幻影剂量系数。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-09 DOI: 10.1093/rpd/ncaf048

S Kaddouch, N El Khayati

引用次数: 0

Evaluation of occupational radiation exposure and influencing factors for healthcare workers during diagnostic computed tomography imaging. 诊断性计算机断层成像过程中卫生保健工作者职业辐射暴露及其影响因素的评价。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-09 DOI: 10.1093/rpd/ncaf049

Keisuke Nagamoto, Tomonori Kawachino, Yoshiki Suetsugu, Reika Urasaki, Saki Tokumoto, Masaoki Kohzaki, Shun-Ichi Nihei, Ryuji Okazaki

{"title":"Evaluation of occupational radiation exposure and influencing factors for healthcare workers during diagnostic computed tomography imaging.","authors":"Keisuke Nagamoto, Tomonori Kawachino, Yoshiki Suetsugu, Reika Urasaki, Saki Tokumoto, Masaoki Kohzaki, Shun-Ichi Nihei, Ryuji Okazaki","doi":"10.1093/rpd/ncaf049","DOIUrl":"https://doi.org/10.1093/rpd/ncaf049","url":null,"abstract":"This study aimed to identify factors that increase radiation dose to computed tomography (CT) imaging assistants and to propose measures to minimize their effective dose, thereby improving radiation safety. Nine healthcare professionals (five intensivists and four radiological technologists) had their Hp(10) measured during 112 diagnostic CT procedures involving tasks categorized by proximity to the gantry: gantry proximal (e.g. bag-valve-mask (BVM) ventilation) and gantry distal (e.g. patient observation). Multiple regression analysis identified dose-length product (DLP) and tube current as significant predictors of effective dose of CT imaging assistants. The highest effective dose, 26 μSv, occurred during gantry proximal tasks. Intensivists received higher effective doses (35 μSv) than radiological technologists (19 μSv) because the CT imaging procedures they assisted with had higher DLP values. To reduce the effective dose, it is recommended to implement low-dose imaging protocols, optimize imaging coverage, and use radiation protection clothing, such as lead aprons, which significantly reduce Hp(10).","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144044775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization study on neutron/γ radiation-protective clothing materials with computational human phantoms. 具有计算人体模型的中子/γ辐射防护服材料优化研究。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-06 DOI: 10.1093/rpd/ncaf010

Shuiyin Qu, Rui Qiu, Shuchang Yan, Jian Huang, Yuqing Niu, Junli Li

{"title":"Optimization study on neutron/γ radiation-protective clothing materials with computational human phantoms.","authors":"Shuiyin Qu, Rui Qiu, Shuchang Yan, Jian Huang, Yuqing Niu, Junli Li","doi":"10.1093/rpd/ncaf010","DOIUrl":"https://doi.org/10.1093/rpd/ncaf010","url":null,"abstract":"The applications of nuclear science and technology in both production and daily life are becoming increasingly widespread. Radiation shielding, as a critical component, ensures environmental safety and protects human health. In this study, 20 shielding schemes were designed using ethylene-propylene diene monomer as the base material. These schemes incorporated various proportions of boron carbide and gadolinium oxide as neutron-absorbing components and tungsten as the gamma-shielding component. Based on the Chinese reference adult male (CRAM) voxel model and using an anterior-posterior (AP) irradiation setup, the Monte Carlo method was employed to calculate 28 organ/tissue doses and effective dose reductions from neutron and gamma radiation across the 20 material compositions. Each case was evaluated at three different thicknesses-1, 3, and 5 mm-with Monte Carlo calculation errors controlled within 1%. Results indicated that, for any composite shielding material, the 5-mm thickness provided optimal protection. When an unmoderated and unthermalized 252Cf neutron source was used, effective dose reductions ranged from 32.60% to 38.75% compared to the unshielded case. With a monoenergetic neutron source at 1 keV, the reduction range was between 57.62% and 69.42%. The trend in changes for different composite shielding materials under neutron sources at different energy levels is consistent. When 137Cs served as the gamma source, effective dose reductions ranged from 7.96% to 20.97%, demonstrating that the composite materials offer substantial protection for both neutron and gamma radiation. Additionally, it was found that organs partially exposed outside the shielding material experienced a slight increase in dose due to neutron scattering. In practical applications, full-body protection should be implemented to mitigate this issue.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144036649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional localization and radioactivity quantification of radiation sources through inverse estimation based on Compton camera measurements. 基于康普顿相机测量的逆估计辐射源的三维定位和放射性量化。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-05 DOI: 10.1093/rpd/ncaf046

Yuki Sato

引用次数: 0

Dose calculation in nuclear medicine with magnetic resonance imaging images using Monte Carlo method. 用蒙特卡罗方法计算核医学磁共振成像图像中的剂量。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-04-28 DOI: 10.1093/rpd/ncaf043

Le Huy Vu, Nguyen Thi Phuong Thao, Nguyen Thien Trung, Pham Vo Trung Hau, Truong Thi Hong Loan

引用次数: 0

GPU accelerated internal dose Monte Carlo simulation in 18F-FDG PET imaging. GPU加速内剂量蒙特卡罗模拟在18F-FDG PET成像。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-04-22 DOI: 10.1093/rpd/ncaf038

Zhiyuan Yang, Zhiling Li, Weihai Zhuo, Lin Xin

引用次数: 0

A survey on the determination of diagnostic reference levels in analog and digital radiography in Iran: a systematic literature review. 伊朗模拟和数字放射照相诊断参考水平测定的调查：系统文献综述。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-04-22 DOI: 10.1093/rpd/ncaf030

Mehdi Ghazizadeh, Mohammad Reza Deevband, Mohammad Reza Kardan, Meysam Tavakoli

{"title":"A survey on the determination of diagnostic reference levels in analog and digital radiography in Iran: a systematic literature review.","authors":"Mehdi Ghazizadeh, Mohammad Reza Deevband, Mohammad Reza Kardan, Meysam Tavakoli","doi":"10.1093/rpd/ncaf030","DOIUrl":"10.1093/rpd/ncaf030","url":null,"abstract":"Introduction: Although ionizing radiation plays a key role in both diagnosis and treatment, it brings potential risks, including incidence of cancer. Diagnostic Reference Level (DRL) is described as a tool to optimize the protection in the medical exposure for diagnostic procedures. The objective of this study is to propose a new method to calculate DRL by reviewing a series of articles which are published on the DRL in radiography.Materials and methods: The study analyzed 16 articles in the last ten years including published data on National and Local DRLs. The weighted mean method was used to propose unique quantities such as the entrance skin dose (ESD) or Entrance Surface Air Kerma (ESAK), and dose area product (DAP) as national DRL.Results: The results showed that there were differences in dose values among diagnostic radiology centers for different examinations. The study provides valuable information to calculate national DRL.Conclusion: The weighted mean of the ESD or ESAK and DAP values has been proposed as a new method for calculating national DRL values, which is considered the significant difference in statistical population and number of articles.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"432-440"},"PeriodicalIF":0.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143788716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalizability of AI-based image segmentation and centering estimation algorithm: a multi-region, multi-center, and multi-scanner study. 基于人工智能的图像分割和定心估计算法的通用性：多区域、多中心和多扫描仪研究。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-04-22 DOI: 10.1093/rpd/ncaf018

Neal S Krishna, Emiliano Garza-Frias, Giridhar Dasegowda, Parisa Kaviani, Lina Karout, Roshan Fahimi, Bernardo Bizzo, Keith J Dreyer, Mannudeep K Kalra, Subba Digumarthy

{"title":"Generalizability of AI-based image segmentation and centering estimation algorithm: a multi-region, multi-center, and multi-scanner study.","authors":"Neal S Krishna, Emiliano Garza-Frias, Giridhar Dasegowda, Parisa Kaviani, Lina Karout, Roshan Fahimi, Bernardo Bizzo, Keith J Dreyer, Mannudeep K Kalra, Subba Digumarthy","doi":"10.1093/rpd/ncaf018","DOIUrl":"10.1093/rpd/ncaf018","url":null,"abstract":"We created and validated an open-access AI algorithm (AIc) for assessing image segmentation and patient centering in a multi-body-region, multi-center, and multi-scanner study. Our study included 825 head, chest, and abdomen-pelvis CT from 275 patients (153 females, 128 males; mean age 67 ± 14 years) scanned at five academic and community hospitals. CT images were processed with the AIc to determine vertical and horizontal centering at the skull base (head CT), carina (chest CT), and L2-L3 disc (abdomen CT). We manually measured the vertical and horizontal off-centering. We found strong correlations between AIc and manual estimate of off-centering in both the vertical (head, r = 0.93; chest, r = 0.94; abdomen, and r = 0.95) and horizontal directions (head CT, r = 0.85; chest, r = 0.85; abdomen, r = 0.8) and across age groups (r = 0.70-0.97), gender (r = 0.81-0.96), and multiple scanners from the five sites (r = 0.74-0.99). The AIc area under the receiver operating characteristic curve for centered and off-centered CT exams ranged from 0.72 (head) to 0.99 (chest). Therefore, our study showed that positron-emission tomography/CT (PET/CT) examinations commonly exhibit significant off-centering, particularly with vertical deviations often exceeding 30 mm and horizontal deviations between 10 and 30 mm. In addition, it demonstrated that our AI model can effectively assess both vertical and horizontal off-centering, although it performs better at estimating vertical off-centering.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"441-449"},"PeriodicalIF":0.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143804032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surgical staff doses during liver transplantation on a patient undergoing Lu-177-DOTATATE radioligand therapy. 外科工作人员在肝移植患者接受Lu-177-DOTATATE放射治疗的剂量。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-04-22 DOI: 10.1093/rpd/ncaf026

Faustino Bonutti, Cinzia Avigo, Vittorio Cherchi, Umberto Baccarani, Edoardo Scarpa, Alessandro Mangogna, Giuseppe Fanetti, Eugenio Borsatti, Annalisa Drigo

引用次数: 0